High volume-high value usage of flue gas desulfurization (FGD) by-products in underground mines: Phase 2 -- Field investigations. Quarterly report, October 1--December 31, 1997

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Description

The field investigation phase of the project was essentially completed when grout placed into auger holes at the Lodestar Energy mine site during Summer 1997 was sampled. Mining had proceeded to a point where the strata overlying the coal was completely removed, thus exposing the grout-filled auger holes. All of the auger holes contained either grout from these experiments or shale that in-filled the non-grouted holes during the process of clearing the top surface of the coal. Eleven grouted holes were sampled, utilizing hammers and chisels, for physical (strength) testing, as well as chemical, mineralogical, and microscopical analysis. Upon arrival ... continued below

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19 p.

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Creator: Unknown. August 1, 1998.

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Description

The field investigation phase of the project was essentially completed when grout placed into auger holes at the Lodestar Energy mine site during Summer 1997 was sampled. Mining had proceeded to a point where the strata overlying the coal was completely removed, thus exposing the grout-filled auger holes. All of the auger holes contained either grout from these experiments or shale that in-filled the non-grouted holes during the process of clearing the top surface of the coal. Eleven grouted holes were sampled, utilizing hammers and chisels, for physical (strength) testing, as well as chemical, mineralogical, and microscopical analysis. Upon arrival at the laboratory, moisture contents, densities, and void ratios were obtained before disturbing the samples, and after strength testing. Representative samples of each grout were then cut into flat-sided prisms, with a height:width ratio {approx}2, to be used for testing of unconfined compressive strength. In summary, all of the grouts had very good mechanical strength, ranging from 1000 psi to 2250 psi. The lowest compressive strength was recorded on a bed ash-based grout.

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19 p.

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OSTI as DE98058006

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  • Other Information: PBD: [1998]

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  • Other: DE98058006
  • Report No.: DOE/MC/30251--20
  • Grant Number: FC21-93MC30251
  • DOI: 10.2172/656646 | External Link
  • Office of Scientific & Technical Information Report Number: 656646
  • Archival Resource Key: ark:/67531/metadc707941

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  • August 1, 1998

Added to The UNT Digital Library

  • Sept. 12, 2015, 6:31 a.m.

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  • Nov. 10, 2015, 7:47 p.m.

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High volume-high value usage of flue gas desulfurization (FGD) by-products in underground mines: Phase 2 -- Field investigations. Quarterly report, October 1--December 31, 1997, report, August 1, 1998; United States. (digital.library.unt.edu/ark:/67531/metadc707941/: accessed September 25, 2017), University of North Texas Libraries, Digital Library, digital.library.unt.edu; crediting UNT Libraries Government Documents Department.